Cargo Door Research Articles

High-Fidelity Simulations of Flight Dynamics and Trajectory of a Parachute–Payload System Leaving the C-17 Aircraft

This article examines the flight dynamics and trajectory analysis of a parachute–payload system deployed from a C-17 aircraft. The aircraft is modeled with an open cargo door, extended flaps, and four turbo-fan engines operating at an altitude of 2000 feet Above Ground Level (AGL) and an airspeed of 150 knots. The payloads consist of simplified CONEX containers measuring either 192 inches or 240 inches in length, 9 feet in width, and 5.3 feet in height, with their mass and moments of inertia specified. At positive deck angles, gravitational forces cause these payloads to begin a gradual descent from the rear of the aircraft. For aircraft at zero deck angle, a ring-slot parachute with approximately 20% geometric porosity is utilized to extract the payload from the aircraft. This study specifically employs the CREATE-AV Kestrel simulation software to model the chute-payload system. The extraction and suspension lines are represented using Kestrel’s Catenary capability, with the extraction line connected to the floating confluence points of the CONEX container and the chute. The chute and payload will experience coupled motion, allowing for an in-depth analysis of the flight dynamics and trajectory of both elements. The trajectory data obtained will be compared to that of a payload (without chute and cables) exiting the aircraft at positive deck angles. An adaptive mesh refinement technique is applied to accurately capture the engine exhaust flow and the wake generated by the C-17, chute, and payloads. Friction and ejector forces are estimated to align the exit velocity and timing with those recorded during flight testing. The results indicate that the simulation of extracted payloads aligns with expected trends observed in flight tests. Notably, higher deck angles result in longer distances from the ramp, leading to increased exit velocities and reduced payload rotation rates. All payloads exhibit clockwise rotation upon leaving the ramp. The parachute extraction method yields significantly higher exit velocities and shorter exit times, while the payload-chute acceleration correlates with the predicted drag of the chute as demonstrated in prior studies.

Design Method for Pressurised and Non-Pressurised Tail Cargo Door’s Fairings Compartment in Transport Category Aircraft

Abstract The method for determining the main parameters of the tail cargo doors of transport category aircrafts is developed. A methodology for the ascertainment of these parameters has been described. An example based on an existing transport aircraft is considered. Gathered were information pertaining to the necessary design, operational and regulatory parameters and requirements of the international regulatory organisations Federal Aviation Regulations (FAR), Certification Specification (CS) and Aviation Regulations (AR). The principle of determining the dimensions of the cargo compartment, cargo floor and the hitting platforms, in the form of a ramp with a pressure door and ladders, is presented based on the initial data. Considering the described loading and unloading, as well as landing, operations, the dependence of the ramp length on the length of the cargo floor is ascertained. A method for designing a cargo door fairings in the transport category aircraft fuselage tail part is presented. The main features of the fairings compartment have been determined, together with those of its main components and their varieties, depending on the scheme of the cargo door. Information is provided on the fairings compartment structural elements parameters selection.

A Brief Analysis of the Working Load and Stroke of the Linear Actuator for the Passenger Aircraft Cargo Door

Towards the cargo door actuator of the passenger aircraft, the load type during service is analyzed, and the load profile is identified and illustrated. For the door actuation system composed of a rear support beam, linear actuator, door, etc., the theoretical working load and stroke of the actuator are calculated, as well as the load and stroke when the components are elastomers. The comparison results show that the reduction of the door stiffness will increase the actuator load, and the reduction of the rear support beam and actuator stiffness will increase the stroke. This study can provide a reference for engineering problems such as door system stiffness allocation, door opening stroke design, and evaluation.

Service Oriented Profile Reliability Assessment of an Aviation Mechatronic Servo Actuation System

Due to its complexity and importance, the reliability problems of the mechatronic servo system have become more and more attention. The reliability design method is applied in the design of mechatronic products, which can ensure the high reliability of mechatronic systems. This paper first introduces the application of a mechatronic servo product on the cargo door of a civil aircraft and describes its structure composition, characteristics, service profile, and multi-type life characteristics of components. In this paper, the reliability design compliance of the product is designed and verified from the aspects of reliability modeling, reliability mission profile, reliability prediction, dispatch reliability prediction, and reliability verification, and the data support for operation and maintenance characteristics is provided.

A Hybrid Control Strategy for a PMSM-Based Aircraft Cargo Door Actuator

There are some disadvantages of a traditional AC-induced motor or hydraulic cylinder-based aircraft cargo door actuator (CDA), such as strong stopping shock, big slippage, high power, or current demand. To solve these problems, a permanent magnet synchronous motor (PMSM)-based linear CDA has been developed, and a hybrid control method combining speed plan and control, power current restriction has been proposed. In other words, low-speed-loop servo control is used in opening and closing positions, and power restricted control is adopted otherwise. A multidisciplinary model is constructed with Simulink. The simulation results show that vibration and slippage are reduced dramatically for the cargo door mechanism, and power is restricted during the whole procedure, which also results in good adaptability performance over a wide range of loads and temperatures. Experiments with different load levels on a test rig and in a temperature chamber at −50 °C are implemented to verify the effectiveness of the strategy.

Analisis Angkutan Kargo Antara ATR 72-600 Passenger, ATR 72-600 Freighter Dan ATR 72-600 Converted Pada Rute Makassar – Kendari

Delivery of goods (cargo) between islands or between countries is faster by air transportation. Air cargo can use passenger aircraft (bulk cargo), Air freighters, Combined air freighters, Converted freighters for the same type of aircraft, such as ATR 72-600. This study discusses fuel consumption, comparison of payload capacity, and comparison of fuel consumption per payload of ATR 72-600 aircraft for the Makassar – Kendari route. namely the ATR 72-600, ATR 72-600 Freighter and ATR 72-600 Converted aircraft. The method used is a quantitative method. The results of the calculation using the flight crew operation manual for ATR 72-600 passenger fuel carried 1.143,4 kg and fuel consumption of 609.4 kg, ATR 72-600 Freighter and Converted aircraft carried 1.210,3 kg of fuel and 613,3 fuel consumption, 4 kg. Fuel costs per kg of cargo, ATR 72-600 Passenger aircraft are more expensive, namely Rp. 1,279 per kg, freighter Rp. 1,136 per kg, converted bulk cargo Rp. 1,175 per kg, Converted Large cargo door Rp. 1,202 per kg. The largest Cargo capacity is 9,000 kg on ATR 72-600 Freighter aircraft and the smallest is 2,150 on ATR 72-600 Passenger aircraft. If cargo delivery does not exceed 2,150 kg, it is more profitable to use ATR 72-600 passenger aircraft, but if the weight or volume sent much larger should use the ATR 72-600 Freighter.

Nonlinear Buckling and Postbuckling Analysis of Tow-Steered Composite Cylinders with Cutouts

The buckling and postbuckling behavior of two composite tow-steered shells with cutouts of different sizes is assessed using nonlinear finite element analysis and compared to experimental measurements. The cylindrical shells are manufactured using an automated fiber placement system, where the shells’ fiber orientation angles vary continuously around the shell circumference from on the crown and keel to on the sides. One shell features thickness variations due to tow overlaps that result from application of all 24 tows during each pass of the fiber placement system. The second shell uses the system’s tow drop/add capability to achieve a more uniform wall thickness without overlaps. Unreinforced cutouts of two different sizes—the first smaller cutout representing a passenger door on a commercial aircraft and the second larger cutout a cargo door—were machined into each of the two cylinders resulting in a total of four test cases. These cylinders were tested in axial compression and buckled elastically in previous work and are now analyzed using nonlinear finite element models to compare bifurcation buckling loads as well as the load–displacement response in the prebuckling and postbuckling regimes. For all four shells analyzed, the prebuckling stiffness, buckling load, and deformation mode sequence throughout the loading–unloading cycle is accurately reproduced by the models. In particular, the shells first buckle locally around the cutouts in a stable (supercritical) manner with only a slight decrease in axial stiffness, which occurs due to the favorable load redistribution facilitated by tow steering. The shells then buckle globally in an unstable (subcritical) manner with diamond-shaped buckles forming to the left and right (circumferential direction) of the cutouts. The buckling load of all shells with cutouts is at least 82% of the buckling load of the pristine shells without cutouts. Overall, the ability to sustain local buckling phenomena, and the relatively small reductions in global buckling load compared to pristine shells without cutouts, demonstrates the great potential of using tow steering to mitigate the adverse effects of cutouts in axially compressed shell structures.

ПРОЕКТУВАННЯ СТУЛКОВОГО ВІДСІКУ ХВОСТОВИХ ВАНТАЖНИХ ЛЮКІВ ЛІТАКІВ ТРАНСПОРТНОЇ КАТЕГОРІЇ

The method for determining the main parameters of the tail cargo doors of transport category aircraft is developed. There have been prepared initial data and described the methodology for finding them. An example based on an existing transport aircraft is considered. The basic nomenclature of transported cargoes of the designed aircraft, its dimensions and weight, methods of loading and mooring, additional loading equipment were taken as initial data. As well as such necessary design, operational and regulatory parameters and data as landing gear type, its “kneeling” system, rails of the upper loading equipment for loading and unloading, cargo trajectories during loading and landing, requirements of international regulatory organizations FAR, CS, AP. The principle of determining the dimensions of the cargo compartment, cargo floor and the hitting platforms in the form of ramp with pressure door, ladders is presented, based on the initial data. Taking into account the loading and unloading, landing operations described the dependence of the ramp length on the length of the cargo floor. The correct formation of these parameters is one of the most important tasks, from the solution of which directly depend the operational characteristics of the future transport aircraft. A method for designing cargo door fairings in the transport category aircraft fuselage tail part is also presented. There have been determined the main features of the fairings compartment, its main components and their varieties, depending on the scheme of the cargo door. At the stage of preliminary design, the principles for determining the main parameters of the fairings compartments based on their design purpose are outlined.Also provided information on the fairings compartment structural elements parameters selection: the axes of the fairings hinge, the selection of control cylinders and their installation, the parameters of the open and closed position locks, pressurization and sealing of the fairings compartment. Considered the design features of the fuselage tail section various theories fairings compartment - made in cross-section with one radius (in the shape of a cylinder) and given in cross-section with two radii (double-deck).

Failure mechanism and reliability analysis of the rear cargo door lock of transport aircraft

The cargo door lock is a critical component of the rear cargo door system of transport aircraft. Malfunction of the cargo door lock may lead to airdrop mission failure or even catastrophic accident. In the reliability test of the rear cargo door system of a transport aircraft, one of the cargo door locks failed to open. However, the failure cannot be remedied by simply strengthening the failed parts. In this work, we analyze the failure mechanism to find out the root cause. Then, the open function reliability is assessed and the local as well as the global reliability sensitivity analysis are performed to interrogate the impacts of the random influence factors. On this basis, the critical random influence factors are identified and accordingly the improvement measures are proposed. After the failed cargo door lock is improved based on the improvement measures, the open function failure didn’t occur again in the subsequent test, verifying the effectiveness of the proposed improvement measures.

Seven Deadly Sins by Hilary Bettis et al.

Reviewed by: Seven Deadly Sins by Hilary Bettis et al. Horacio Sierra SEVEN DEADLY SINS. By Hilary Bettis, Nilo Cruz, Moisés Kaufman, Rogelio Martinez, Dael Orlandersmith, Carmen Pelaez, and Aurin Squire. Directed by Michel Hausmann. 1100 Block of Lincoln Road, Miami Beach. December 4, 2020. On a day when the US Centers for Disease Control and Prevention reported that 2,439 Americans died from COVID-19, those of us who ventured to see Miami New Drama’s Seven Deadly Sins were not hard pressed to wonder which of these ancient sins we committed by attending an in-person theatrical performance. Did we exhibit Pride by betting masks, handwashing, and keeping six feet apart would be enough to save us from infection? Were we guilty of Gluttony because, after nine months of being quarantined from live entertainment, we were consumed by our insatiable desire to see artists in the flesh? Within the context of closing out a year marred by pandemic, racial unrest, and hostile political gamesmanship, the universal themes and timely issues presented in this experimental series of seven, ten-minute vignettes underscored that we were not the first to pose such questions and we would not be the last. Miami New Drama artistic director Michel Haus-mann hatched his idea for Seven Deadly Sins while strolling down Miami Beach’s sparsely populated Lincoln Road, a pedestrian street usually teeming with tourists and locals. Having noticed the number of the storefronts shuttered and hoping for a way to revitalize the commercial strip, Hausmann envisioned the storefronts as makeshift theatres. He commissioned a diverse group of playwrights of four men and three women, five of whom are Hispanic and two of whom are non-Hispanic Black, to write the scripts. With the help of COVID-19 safety protocols approved by the Actors’ Equity Association, the company presented a safe way for performers, crew members, and audience members to enjoy live theatre. The Colony Theater’s box office provided audience members with a wristband marked with a deadly sin. They were then asked to have drinks and appetizers at Purgatory, a pop-up bar located in the center of Lincoln Road. The Mistress of Purgatory (Kareem Khouri) serenaded the audience with songs before they were divided into groups based on their designated sin. Guides bearing electric torches escorted each group from stage to stage and morphed into COVID-19 safety protocol enforcers. Six storefront windows as well as the Colony’s street-facing cargo door served as stages; twelve chairs spaced individually and in pairs in front of [End Page 234] each stage served as seating. Theatregoers were given headphones that they plugged into receivers fastened to each chair so they could hear dialogue and sound effects. In perhaps the most interesting seating arrangement, since the cargo door for the Colony faces Lenox Avenue, half of the audience sat in chairs in a parking spot and the other half sat across the street in chairs assembled on the sidewalk opposite the theatre while cars and trucks barreled through the audience. Click for larger view View full resolution Two adjoining storefront windows serve as the stages for Seven Deadly Sin’s Pride and Sloth, where Stephen G. Anthony (John C. Calhoun) and Sandi Stock (Regina) perform. The play won the 2021 Drama League Award for Outstanding Interactive or Socially Distanced Theater. (Photo: Justin Swader.) Despite the risk-taking involved in attending live theatre as the pandemic raged, the very act of seeing Seven Deadly Sins felt less sinful than life affirming. The spectacle of staging a production that upheld COVID-19 safety protocols and the strangeness of seeing a play while being watched by passersby enjoying an evening on Miami Beach treated the audience like it too was an ensemble of actors. This heady amalgamation of fear and daring created a thrilling atmosphere where the lines between actors and audience, exhibitionist and voyeur, conscientious citizen and salacious scofflaw were shattered. As fascinating as the safety precautions were, the playwrights and directors did a fine job ensuring that the logistics of how to perform during a pandemic did not overshadow the artistic merits of their work. The seven deadly sins have proven a...

МУЛЬТИАКСИАЛЬНЫЕ УГЛЕРОДНЫЕ ТКАНИ В ИЗДЕЛИЯХ АВИАЦИОННОЙ ТЕХНИКИ (обзор)

The article considers the main advantages and disadvantages of application of multiaxial fabrics as reinforcing fillers for composite materials with a polymer matrix, and specifies the most common processing technologies of multiaxial fabrics into a composite material. The paper provides the information about the use of carbon multiaxial fabrics in the manufacture of structures for aircraft products by the example of the production of the Airbus A380 rear bulkhead and of the Airbus A400M upper cargo door. Brief characteristics of the world’s leading manufacturers of carbon fiber multiaxial fabrics for aircraft products are given.

Airflow Characteristics in Aeromedical Aircraft: Considerations During COVID-19

ObjectiveThe aeromedical transport of coronavirus patients presents risks to clinicians and aircrew. Patient positioning and physical barriers may provide additional protection during flight. This paper describes airflow testing undertaken on fixed wing and rotary wing aeromedical aircraft. MethodsAirflow testing was undertaken on a stationary Hawker Beechcraft B200C and Leonardo Augusta Westland 139. Airflow was simulated using a Trainer 101 (MSS Professional A/S, Odense Sø, Syddanmark, Denmark) Smoke machine. Different cabin configurations were used along with variations in heating, cooling, and ventilation systems. ResultsFor the Hawker Beechcraft B200C, smoke generated within the forward section of the cabin was observed to fill the cabin to a fluid boundary located in-line with the forward edge of the cargo door. With the curtain closed, smoke was only observed to enter the cockpit in very small quantities. For the Leonardo AW139, smoke generated within the cabin was observed to expand to fill the cabin evenly before dissipating. With the curtain closed, smoke was observed to enter the cockpit only in small quantities ConclusionThe use of physical barriers in fixed wing and rotary wing aeromedical aircraft provides some protection to aircrew. Optimal positioning of the patient is on the aft stretcher on the Beechcraft B200C and on a laterally orientated stretcher on the AW139. The results provide a baseline for further investigation into methods to protect aircrew during the coronavirus pandemic.

Integrated modelling and simulation method of a cargo door actuator

An integrated Matlab model comprising of an electro-mechanical actuator (EMA) model, load model and state model has been constructed to investigate the cargo door actuator motion control, operation and working states, of which, a Simulink® servomotor system model is adopted to mimic the EMA actuator, a SimMechanics® model is used to compute the actuator's load, a Stateflow® state transition model is employed to simulate the working process. The results indicated that the motion is well controlled, generated load force is valid, working states and their transition logics are reasonable. The simulation verified the effectiveness and easiness of the integrated modelling method.

Safety design method of a civil aircraft cargo door actuation system

A safety design method of a civil aircraft cargo door actuation system has been listed in this study in order to fulfil the requirements of airworthiness throughout the product's life circle, in which a safety design process has been illustrated to show the entire process which will have an impact on the function design. A safety analysis method of fault tree analysis has been chosen to realise the purpose, which is based on the fault modes provided from failure modes and effects analysis and the system reliability prediction results. A design refinement has been made according to the analysis results in order to realise a high safety system.

МЕТОД ВИЗНАЧЕННЯ ОСНОВНИХ ПАРАМЕТРІВ ВАНТАЖНОГО ЛЮКА В ХВОСТОВІЙ ЧАСТИНІ ФЮЗЕЛЯЖУ ЛІТАКІВ ТРАНСПОРТНОЇ КАТЕГОРІЇ

A method has been developed for determining principal parameters for aft cargo door of transport aircraft. A list of input data is given and a technique for finding them is described. An example based on an existing transport aircraft is considered. The following has been used as source data: basic cargo nomenclature to be transported by the designed aircraft, cargo overall dimensions and weight, methods of loading and mooring, loading facilities. More over the design, operational and regulatory parameters are needed, such as landing gear configuration, its bottoming system, extension of rails of the upper equipment for loading/unloading, cargo trajectories during loading and airdropping, codes of the international regulatory bodies such as FAR, CS, AP. Based on the source data, the principle of determining the dimensions of the cargo compartment, cargo floor and the loading sites in the form of a ramp with a pressure bridge, and air stairs is given. The relation between the ramp length and the cargo floor length is described taking into account the loading, unloading and air dropping operations. Correct calculation of these parameters is the most important task, because performance of the future transport aircraft directly depends on the solution. The technique of determining the cargo door opening, development of the load-bearing structure of the transport aircraft fuselage aft section, its main strong elements – the cargo door beam, the ramp, the attachment units, the ramp locks – is given. The interconnection of the ramp load-bearing structure with the load-bearing structure of the fuselage aft part, the options for transferring loads perceived by the ramp to the frame are described. Examples of two types – flat and volumetric – of the cargo door beams, as well as the method of their assignment are considered. Trajectories of the extreme points of the in-gauge load are determined using graphical method for loading, unloading, and airdropping operations. Taking into account the positions of these trajectories makes it possible to select the desired cutout in the fuselage aft section. While designing the aft cargo doors the main features are highlighted. These features when considered make it possible to determine the most optimal parameters of the cutout, the cargo door type and its components.

Dynamic importance measure for the K-out-of-n: G system under repeated random load

Importance measures have been widely used in system reliability design and optimization to find out system weaknesses. But the existing importance measures are hard to identify the dynamic weakness effectively for systems subjected to repeated and random load. Based on the stress-strength interference (SSI) model, this paper aims to develop a dynamic importance measure for k-out-of-n: G systems under repeated random load. At first, the importance measure for systems under repeated random load is put forward by using the order statistics theory. Then by describing the loading process with the Poisson process, a time-dependent model of the dynamic importance measure is established. Further, a Monte Carlo (MC) simulation method is proposed to verify the correctness of the dynamic importance measures. Finally, the reliability analysis for a multi-lock cargo door system in the air freighter is implemented to illustrate the practical application of the dynamic importance measure.

Sensor placement optimization on complex and large metallic and composite structures

This study presents an effective solution for the optimization of piezoelectric (PZT) wafer placement in a network of convex and non-convex structures, toward the application in the field of structural health monitoring. The proposed objective function is to maximize the coverage of the monitored area, discretized by a set of control points, while minimizing the number of PZT wafers. In the optimum solution, each control point should be covered by a user-defined number of sensing paths, defined as the coverage level. The PZT locations were treated as continuous variables. Thus, during the optimization process, any location on the plate is considered as a potential position for a PZT wafer. The algorithm provides the flexibility of changing a wide range of parameters including the number of PZT wafers, the distance covered around the sensing path, the required coverage level, and the number of control points, in addition to identifying the most sensitive PZT wafer within the network. The tractability of the model proposed was improved by feeding the solver an initial solution. The model calculates the importance of each PZT wafer within the network, which allows for further reduction in the number of active PZT elements. The suggested model was solved using a genetic algorithm. Multiple sensor network configurations on composite and metallic structures were selected, including a large cargo door of an A330 airplane, and validated experimentally. The experimental validation was to evaluate the accuracy in damage localization within the optimized sensor networks. The results demonstrated the proficiency of the model developed in distributing the PZT wafers on non-convex structures and large metallic structures.

Behind closed doors: the DC-10 and the demise of McDonnell Douglas

Theoretical basis This case has three primary objectives. First, it allows students to think through a conceptual cost and benefit analysis associated with the decision-making process in line with basic economic thinking. Students will revisit core concepts of marginal benefit vs marginal cost, the notion of opportunity costs and the role of sunk costs in this type of analysis, while also highlighting the nature of market structure, oligopolies and competition across firms in an industry. The second goal of this case is to consider the role of business ethics in the DC-10 case: specifically, to consider the potential influence of moral awareness and moral disengagement in unethical decisions made by McDonnell Douglas. Students will develop an understanding of these concepts and solidify their learning by applying them to the case and engaging in active discussion. Finally, the third goal of the case allows students to explore organizational culture and specifically offer recommendations for organizations thinking about the link between decision-making, the role of ethics and culture. Research methodology The technical reports released by the National Transportation Safety Board along with secondary data such as available public data such as news reports were used to round out the synopsis of the case study. Case overview /synopsis This case explores the accidents of two McDonnell Douglas DC-10s in the early 1970s at the onset of the jumbo jet race between Boeing, Lockheed and McDonnell Douglas. It explores the series of events during the “Windsor Incident” in 1972 and the subsequent accident over Paris in 1974. It explores the reasons why the cargo door on the DC-10 was faulty and subsequently why the door was not fixed. It examines the interplay of industry suppliers such as McDonnell Douglas and how they interact with oversight authorities such as the Federal Aviation Authority. The Teaching Note focuses on the economic thinking at McDonnell Douglas, behavioral ethics and organizational culture. Complexity academic level This case is best explored over a 90 min session but could be expanded to take up one 3 h session. The authors have used this case format in an undergraduate organizational behavior class, an MBA Leadership and Organizational Change class, and an MBA Economics of Managers class. It works particularly well in the MBA setting, as students with work experience can see the links between the mistakes made by McDonnell Douglas and their workplaces.

Crashworthiness analysis of an aircraft fuselage section with an auxiliary fuel tank using a hybrid multibody/plastic hinge approach

The drop test of a Boeing-737 fuselage section is modelled using a multibody (MB) with spatial plastic hinge method. The test is simulated in MADYMO to evaluate the structural interaction of the cabin with a stiff auxiliary fuel tank underneath the floor, in a severe but survivable impact condition. The fuselage ribs, cargo door frame, cargo door, and passenger floor with spar webs are modelled using a large number of bodies and universal joints with directional properties to allow for appropriate torsional and bending deformations. The contacts for the fuselage section are modelled using a Hertzian-based contact force model with dissipative damping. The simulation results from the MB approach show reasonably good agreement with those from the experimental test and from a detailed finite element (FE) model. This MB approach then could be a viable tool in modelling occupant and structural deformations for aircraft crashworthiness problems.

流动分离与涡结构显示的激光诱导荧光水洞实验技术

The purpose of the study on experiment technology of laser induced fluorescence in water tunnel is to provide a practical, intuitive, and effective method for flow visualization on separation and vortex structure. Rhodamine B was selected as the stain and fluorescence agent which matched the optical parameter and the characteristics of green laser sheet with 532 nm wavelength in 1 m1 m water tunnel. The study focused on the key technical problems such as the constitution and preparation method of stain and fluorescent agent, the selection of the optimum intensity of continuous laser, the matching relationship between flow velocity and the pore pressure of dyeing line and the matching relationship between camera field of view and the flow structure in the contrast of fine adjustment. The experiments were carried out to investigate the flow field around a cylinder, the wing of a transport plane model and the cargo door of a transport plane model together with the wake by means of the dedicated laser induced fluorescence experiment technology. The typical experiment results verify that the dedicated laser induced fluorescence technique is suitable for flow visualization on flow separation and vortex structure including boundary layer, spatial separation and wake field which is a promising method worthy of popularization and application.